Last of the Great Unknown Synopsis
Highly rated at 8.0/10, Last of the Great Unknown (2012) is a standout in the catalog. This Documentary film tells an engaging story. It has a runtime of 22 minutes. The story of Grand Canyon's hidden slot canyons, the canyoneers who systematically explored their drainages, and the secrets hidden deep within their walls.
Last of the Great Unknown Director
Dan Ransom
Last of the Great Unknown Cast
Bill Formanek, Todd Martin, Dave Nally, Rich Rudow, Guy Smith
